LAGOS, Nigeria — Nigerian authorities rushed to obtain isolation tents Wednesday in anticipation of more Ebola infections as they disclosed five more cases of the virus and a death in Africa’s most populous nation.

The five new Nigerian cases were in Lagos, a megacity of 21 million people in a country already beset with poor health care infrastructure and widespread corruption. All five were reported to have had direct contact with one infected man.

Meanwhile, the World Health Organization began a meeting to decide whether the crisis, the worst recorded outbreak of its kind, amounts to an international public health emergency. At least 932 deaths in four countries have been blamed on the illness, with 1,711 reported cases.

In recent years, the WHO has declared an emergency only twice, for swine flu in 2009 and polio in May. The declaration probably would come with recommendations on travel and trade restrictions and wider Ebola screening.

It also would be an acknowledgment that the situation is critical and could worsen without a fast global response.

The WHO did not confirm the new cases reported in Nigeria. And Nigerian authorities did not release details on the latest infections, except to say they had come into direct contact with the sick man who arrived by plane in Lagos last month.

With the death toll mounting in the region, Liberia’s president announced a state of emergency Wednesday and said it might result in the suspension of some citizens’ rights. She lamented that fear and panic had kept many family members from sending sick relatives to isolation centers.

“Ignorance and poverty, as well as entrenched religious and cultural practices, continue to exacerbate the spread of the disease,” said President Ellen Johnson Sirleaf.

And in Sierra Leone, where enforcing quarantines of sick patients also has been met with resistance, about 750 soldiers deployed to the Ebola-ravaged east as part of “Operation Octopus.”

Ebola, which causes some victims to bleed from the eyes, mouth and ears, can be transmitted only through direct contact with the bodily fluids of someone who is sick — blood, semen, saliva, urine, feces or sweat.

Millions in Lagos live in cramped conditions without access to flushable toilets. Signs posted across the city warn people not to urinate in public.

Kenneth Akihomi, 47, a worker installing fiber-optic cable, said he was carefully washing his hands to avoid infection. But he said most people were relying on faith to stay healthy.

“They’re not panicking. They are godly people,” he said. “They believe they can pray, and maybe very soon there will be cure.”

The revelation of more infections also came amid a public-sector doctors’ strike in Nigeria that began in July. So far, health workers monitoring the latest Ebola patients are still on the job.

Nigeria is the fourth West African country to be hit by the Ebola outbreak since it emerged in March in the remote tropical forests of Guinea. The disease spread to neighboring Sierra Leone and Liberia before reaching Nigeria.

Nigerian authorities said Tuesday that doctors did not suspect Patrick Sawyer was suffering from Ebola when the 40-year-old Liberian-American arrived by plane late last month in Lagos.

Sawyer, who worked for the Liberian government in Monrovia and had a wife and three young daughters in Minnesota, was on a business flight to Nigeria when he fell ill. Officials say a nurse who treated him has died and five others are sick with Ebola, including a doctor involved in his care.

The specter of the virus spreading in Nigeria is alarming, said Stephen Morse, an epidemiology professor at Columbia University’s Mailman School of Public Health. “It makes you nervous when so many people are potentially at risk,” he said.

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